1. Built-in battery, 1-2 months ultra long battery life depends on the mode2. 18dB ultra low noise, mute operation3. & portable, desktop & wall-mounted 2 installation methods4. oil , detachable & replaceableModes:1. Blue light: Spray 2 sec each 15 min, 24 h loop2. Green light: Spray 2 sec each 30 min, 24 h loop3. Red light: Spray 2 sec each 60 min, 24 h loop4. Green light: Press the button and hold to spray continuously, release to stop.Battery capacity: 300mAhCharge port: Type-cCharge time: 40min oil capacity: 35mlSize: 150 x 66 x 34mmcolor:WhiteMaterial:ABSPackage Contents:1 x Diffuser1 x USB cable1 Set x installation accessoriesOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.